Re-evaluation of gestational age as a predictor for subsequent preterm birth.

ABSTRACT:

Background

To evaluate gestational age as a predictor of subsequent preterm birth.

Materials and methods

This was a retrospective birth cohort study to evaluate gestational age as a predictor of subsequent preterm birth. Participants were mothers who gave birth to their first two children in Western Australia, 1980-2015 (N = 255,151 mothers). For each week of final gestational age of the first birth, we calculated relative risks (RR) and absolute risks (AR) of subsequent preterm birth defined as final gestational age before 28, 32, 34 and <37 weeks. Risks were unadjusted to preserve risk factor profiles at each week of gestation.

Results

The relative risks of second birth before 28, 32, and 34 weeks' gestation were all approximately twenty times higher for mothers who

SUBMITTER: Pereira E 

PROVIDER: S-EPMC7822520 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature